What are some useless, but interesting, pieces of information you know?

Goldfish actually have pretty good memories. Studies have shown that they can remember things for weeks and even months.

The Immortal Jellyfish: Turritopsis dohrnii, often referred to as the "immortal jellyfish," has the ability to revert its cells back to their earliest form and start its life cycle anew. This process can theoretically go on indefinitely.

Dung Beetles Navigate Using the Milky Way: Dung beetles use the Milky Way as a navigational aid. Research has shown that they can roll their dung balls in a straight line by taking cues from the pattern of light generated by the stars.

Tongue Print: Similar to fingerprints, everyone also has a unique tongue print. The patterns of the bumps and ridges on the tongue are distinctive for each person.

Every person smells different: Each person has a unique scent, influenced by their genetic makeup, diet, and other factors. Twins, despite having nearly identical genetics, can still have distinct odors.

The fastest growing plant int the world is Moso bamboo. Moso bamboo has been recorded to grow at an astonishing rate of up to 91 centimeters (36 inches) in a single day under optimal conditions.

The Great Emu War: In 1932, Australia waged what became known as the "Great Emu War." The government deployed soldiers armed with machine guns to deal with an overpopulation of emus, resulting in a somewhat comical conflict.

We have known the Earth’s Circumference for 1783 years. In ancient Greece, Eratosthenes calculated the Earth's circumference with remarkable accuracy around 240 BCE. He did so by measuring the angle of the sun's rays in two different locations and using the distance between them.